calibre 3.39.1+dfsg-2build1 (ppc64el binary) in ubuntu eoan

Calibre is a complete e-library solution. It includes library management,
format conversion, news feeds to e-book conversion, e-book viewer and editor,
and e-book reader sync features.
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Calibre is primarily an e-book cataloging program. It manages your e-book
collection for you. It is designed around the concept of the logical book,
i.e. a single entry in the database that may correspond to e-books in several
formats. It also supports conversion to and from a dozen different e-book
formats.
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Calibre supports almost every single e-Reader (e.g., Kindle, Kobo, Nook) and
is compatible with more devices with every update. Calibre can transfer your
e-books from one device to another in seconds, wirelessly or with a cable.
It will send the best file format for your device converting it if
needed, automatically.
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Calibre can automatically fetch news from a number of websites/RSS feeds,
format the news into a e-book and upload to a connected device.
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Calibre has also a built-in e-book viewer that can display all the major e-book
formats.